I have a D2a with cdl and T/C and am about to put air lockers in from my old D1 . Why because i want the positive locking with choice ! And that is my opinion , I have had a Defender extreme with T/C It worked well but not as good as air lockers but if i kept it i would have giving it the air locker treatmeant . At the end of the day the choice will $ orientated or not if not spend your money wisley once with the correct decision and be happy with your decision:cool:

